Bump io.jenkins.tools.bom:bom-2.504.x

Bumps [io.jenkins.tools.bom:bom-2.504.x](https://github.com/jenkinsci/bom) from 5252.va_0266944a_b_42 to 5473.vb_9533d9e5d88.
- [Release notes](https://github.com/jenkinsci/bom/releases)
- [Commits](https://github.com/jenkinsci/bom/commits)

---
updated-dependencies:
- dependency-name: io.jenkins.tools.bom:bom-2.504.x
  dependency-version: 5473.vb_9533d9e5d88
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -35,7 +35,7 @@
       <dependency>
         <groupId>io.jenkins.tools.bom</groupId>
         <artifactId>bom-${jenkins.baseline}.x</artifactId>
-        <version>5252.va_0266944a_b_42</version>
+        <version>5750.vec44cb_c78352</version>
         <scope>import</scope>
         <type>pom</type>
       </dependency>